How to Solve Color Difference Issues in GRC Decorative Panels? Qinglong Group's Color Control and Batch Consistency Management

The color difference issue of GRC decorative panels needs to be addressed systematically through "raw material batch management, production process control, and on-site color adjustment compensation." High-quality products should have a batch-to-batch color difference of ΔE ≤ 2.0, and within the same project ΔE ≤ 1.5. In the 5,200-square-meter GRC curtain wall project at the Dongguan Women and Children's Activity Center, Qinglong Group established a raw material chromaticity database, standardized mixing processes (time error ±5 seconds), and steam curing temperature control (fluctuation ±2°C), achieving a maximum ΔE difference of only 1.2 across 30 production batches—far superior to the industry standard of ΔE ≤ 3.0. Our "substrate coloring + surface coating" dual-protection process, combined with on-site fine-tuning technology, ensures that GRC decorative panels maintain consistent color performance under different lighting conditions, meeting the stringent aesthetic requirements of high-end projects.

Raw Material Management Is the Source of Color Control

Cement whiteness remains stable (≥85%); pigment batch difference ΔE ≤ 0.5; samples are retained from each batch of raw materials for comparison. Qinglong Group reduces raw material fluctuations through centralized procurement and large-scale warehousing. In the Shenzhen Longhua Xiangshan Science and Technology Park project, refined control resulted in zero color complaints throughout the project period.

Production Processes Ensure Consistency

Mixing time, water addition, and curing procedures are standardized; the first piece of each shift undergoes color calibration. Qinglong Group has introduced online spectrometer monitoring to adjust processes in real time. Color stability is a reflection of brand reputation.

On-site Construction Reduces Visual Discrepancies

During installation, panels are zoned by batch number and observed under natural light; the same light source is used when necessary. Qinglong Group provides a color difference repair guide for quick handling of minor discrepancies. Systematic management achieves perfect color uniformity.